Heavy Duty 2 Way Car Truck Radio Excavator Radio 12-24v Am Fm with Mp3 Player UNIVERSALITY:All world frequency in unit; Aux-in.Suitable for excavator, agricultural machinery, go kart, golf car, yacht PASS AUTHORITY TEST: Certified thunder-proof, aseismic and waterproof, also have a much higher resistance to vibration than most of other radios NOTE:AM/FM brand but without CD due to dust problem FEATURES:12V/24V automatically interchangeable by radio FUNCTION:User can listen to music through car speaker; Can set up it at any place